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(2013) Antenatal interventions for reducing weight in obese woman for improving pregnancy outcome. Cochrane Database Syst Rev doi: 10.1002\/14651858.CD009334.pub2.","DOI":"10.1002\/14651858.CD009334.pub2"},{"key":"2","doi-asserted-by":"crossref","unstructured":"2 American College of Obstetricians and Gynecologists (2013) ACOG Committee opinion no. 549: obesity in pregnancy. Obstet Gynecol 121: 213\u2013217.","DOI":"10.1097\/01.AOG.0000425667.10377.60"},{"key":"3","doi-asserted-by":"crossref","unstructured":"3 Oken E, Kleinman KP, Belfort MB, Hammitt JK, Gillman MW (2009) Associations of gestational weight gain with short- and longer-term maternal and child health outcomes. Am J Epidemiol 170: 173\u2013180.","DOI":"10.1093\/aje\/kwp101"},{"key":"4","unstructured":"4 Institute of Medicine (US) and National Research Council (US) Committee to Reexamine IOM Pregnancy Weight Guidelines (2009) Weight gain during pregnancy; reexamining the guidelines. In: Rasmussen KM, Yaktine AL (eds.) The National Academies Collection: Reports Funded by National Institutes of Health. National Academies Press (US), Washington (DC)."},{"key":"5","doi-asserted-by":"crossref","unstructured":"5 Bianco AT, Smilen SW, Davis Y, Lopez S, Lapinski R, et al. (1998) Pregnancy outcome and weight gain recommendations for the morbidly obese woman. Obstet Gynecol 91: 97\u2013102.","DOI":"10.1016\/S0029-7844(97)00578-4"},{"key":"6","doi-asserted-by":"crossref","unstructured":"6 Flick AA, Brookfield KF, de la Torre L, Tudela CM, Duthely L, et al. (2010) Excessive weight gain among obese women and pregnancy outcomes. Am J Perinatol 27: 333\u2013338.","DOI":"10.1055\/s-0029-1243304"},{"key":"7","doi-asserted-by":"crossref","unstructured":"7 Hinkle SN, Sharma AJ, Dietz PM (2010) Gestational weight gain in obese mothers and associations with fetal growth. 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J Clin Med Res 9: 64\u201366.","DOI":"10.14740\/jocmr2810w"},{"key":"17","doi-asserted-by":"crossref","unstructured":"17 Examination committee of criteria for \u2018obesity disease\u2019 in Japan; Japan society for the study of obesity (2002) New criteria for \u2018obesity disease\u2019 in Japan. Circ J 66: 987\u2013992.","DOI":"10.1253\/circj.66.987"},{"key":"18","doi-asserted-by":"publisher","unstructured":"18 Minakami H, Maeda T, Fujii T, Hamada H, Iitsuka Y, et al. (2014) Guidelines for obstetrical practice in Japan: Japan Society of Obstetrics and Gynecology (JSOG) and Japan Association of Obstetricians and Gynecologists (JAOG) 2014 edition. J Obstet Gynaecol Res 40: 1469\u20131499.","DOI":"10.1111\/jog.12419"},{"key":"19","unstructured":"19 Promotion Council for Healthy Parents and Children 21 (second edition). Ministry of Health, Labour and Welfare (2015)."},{"key":"20","doi-asserted-by":"crossref","unstructured":"20 Enomoto K, Aoki S, Toma R, Fujiwara K, Sakamaki K, et al. (2016) Pregnancy outcomes based on pre-pregnancy body mass index in Japanese women. PLoS One 11: e0157081.","DOI":"10.1371\/journal.pone.0157081"},{"key":"21","doi-asserted-by":"crossref","unstructured":"21 Beyerlein A, Schiessl B, Lack N, von Kries R (2011) Associations of gestational weight loss with birth related outcome: a retrospective cohort study. BJOG 118: 55\u201361.","DOI":"10.1097\/OGX.0b013e318217dfb2"},{"key":"22","doi-asserted-by":"crossref","unstructured":"22 Nohr EA, Vaeth M, Baker JL, Sorensen T, Olsen J, et al. (2008) Combined associations of pre-pregnancy body mass index and gestational weight gain with the outcome of pregnancy. Am J Clin Nutr 87: 1750\u20131759.","DOI":"10.1093\/ajcn\/87.6.1750"},{"key":"23","doi-asserted-by":"crossref","unstructured":"23 Cedergren MI (2007) Optimal gestational weight gain for body mass index categories. 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